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Finding the Fourth Proportional to 641,457.60, 885,132 and 354,937.92

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Solution

The fourth proportional to 641,457.60, 885,132 and 354,937.92 is: 489,770.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,457.60 : 885,132 = 354,937.92 : x
  2. Step 2: Convert to fraction form
    641,457.60/885,132 = 354,937.92/x
  3. Step 3: Cross multiply
    641,457.60x = 885,132 × 354,937.92
  4. Step 4: Simplify right side
    641,457.60x = 314,166,911,005.44
  5. Step 5: Solve for x
    x = 314,166,911,005.44/641,457.60
  6. Step 6: Final answer
    x = 489,770.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.